摘要
通过Fe^(3+)强化热活化过硫酸盐调理污泥,考察污泥脱水性能变化和破解效果并探讨其作用机制。采用毛细吸水时间(CST)表征污泥脱水性能,采用溶解性磷、氨氮、EPS表征污泥破解效果,采用三维荧光光谱(3D-EEM)表征蛋白质等大分子有机物质含量变化。结果表明,Fe^(3+)具备提高热活化过硫酸盐调理污泥的能力,CST大幅度降低,从原污泥的261.3s降到28.7s,降幅达到89.0%。在此条件下,污泥得到有效破解,EPS中有机物质、氨氮及可溶性总磷发生迁移,原泥TB-EPS层中蛋白质和多糖物质含量显著降低,S-EPS与LB-EPS层中蛋白质和多糖含量增加。Fe^(3+)/热活化PMS处理组中的氨氮含量是原泥的6.8倍,溶解性磷含量是原泥的4.6倍。该处理方式可以显著提高污泥脱水性能,增强破解效果,有利于污泥的后续处置。
Using Fe^(3+)to enhance thermally activated persulfate to condition sludge,the changes in sludge dewater ability and cracking effect were investigated,and the mechanism was explored.The capillary water absorption time(CST)was used to characterize the sludge dewater ability,soluble phosphorus,ammonia nitrogen,and EPS were used to characterize the sludge cracking effect,and three-dimensional fluorescence spectroscopy(3D-EEM)was used to characterize the changes of macromolecular organic substances such as proteins.The results show that Fe^(3+)can improve the effects of thermally activated persulfate to condition sludge,resulting in a significant reduction in CST,from 261.3sof the original sludge to 28.7s,with a decrease of 89.0%.Under this condition,sludge is cracked effectively,and organic matter,ammonia nitrogen,and soluble total phosphorus in EPS migrate.The protein and polysaccharide content in the tightly bound EPS of the original sludge is significantly reduced,while the protein and polysaccharide content in the Soluble-EPS and Loosely Bound EPS layers increase.The ammonia nitrogen content in the Fe^(3+)/thermally activated PMS treatment group is 6.8times that of the original slugde,and soluble phosphorus content is 4.6times that of the original slugde.This treatment method can significantly improve sludge dewater ability,enhance the cracking effect,which is benefit to the subsequent disposal of sludge.
作者
申士昊
郭绍东
汪恂
朱雷
SHENShi-hao;GUO Shao-dong;WANG Xun;ZHU Lei(School of Urban Construction,Wuhan University of Science and Technology,Wuhan 430065,China)
出处
《武汉理工大学学报》
CAS
2023年第5期80-87,共8页
Journal of Wuhan University of Technology
基金
国家自然科学基金青年科学基金(52200173).
关键词
三价铁
过硫酸盐
污泥脱水
胞外聚合物
trivalent iron
persulfate
sludge dewater
extracellular polymeric substance
